Permanent magnet actuating mechanism for high-voltage vacuum circuit breaker based on principle of electromagnetic repulsion

Abstract

The invention discloses a permanent magnet actuating mechanism for a high-voltage vacuum circuit breaker based on a principle of electromagnetic repulsion, and belongs to the field of high-voltage vacuum circuit breakers. The permanent magnet actuating mechanism comprises an electromagnetic driving mechanism, a permanent magnet holding mechanism, an opening-buffering spring, a guide rod and a non-magnetic frame, and is characterized in that the electromagnetic driving mechanism comprises an opening electromagnetic repulsion mechanism and a closing electromagnetic driving mechanism; the permanent magnet holding mechanism comprises an opening permanent magnet, a closing permanent magnet, a holding static iron core and a holding moving iron core; and a non-magnetic gasket is arranged between the permanent magnet holding mechanism and the opening-buffering spring. The permanent magnet mechanism is enabled to realize high-speed opening at an initial period of an opening operation by using a characteristic of high-speed driving of the electromagnetic repulsion mechanism and energy stored by the spring in the closing process, and the opening-buffering spring plays a role of buffering at the final stage of the opening process, so that the instantaneous separating speed of the permanent magnet actuating mechanism is greatly improved on the one hand, and the loss, which is caused by excessively high speed at the final stage of opening, of the mechanism and the circuit breaker is restricted on the other hand.

Description

technical field [0001] The invention relates to a permanent magnet operating mechanism for a high-voltage vacuum circuit breaker based on the principle of electromagnetic repulsion, and belongs to the field of high-voltage vacuum circuit breakers. Background technique [0002] The smart grid has become the latest direction of the development and transformation of the world's power system. Improving the reliability and quality of power supply in the smart distribution network requires electrical equipment to have a certain degree of intelligence and automation. The circuit breaker is an important device for power system control and protection, and its performance is mainly affected by the performance of the operating mechanism. Compared with other operating mechanisms, it has the advantages of simple structure, small number of parts, low operating energy consumption, long service life, etc., and it has attracted more and more attention. Its excellent dynamic characteristics c...

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Problems solved by technology

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a permanent magnet operating mechanism for high-voltage vacuum circuit breakers based on the principle of electromagnetic repulsion, which solves the problems of low opening speed and long response time of the previous high-voltage vacuum circuit breaker operating mechanisms. question

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